Add DIR_ANDROID_EXTERNAL_STORAGE to base/base_path.h

This adds a method to get the external storage directory on Android.

BUG=


Review URL: https://chromiumcodereview.appspot.com/10867020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@153183 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed